Is it possible to reuse python @click.option decorators for multiple commands?

You can build your own decorator that encapsulates the common options:

def common_options(function):
    function = click.option('--unique-flag-1', is_flag=True)(function)
    function = click.option('--bar', is_flag=True)(function)
    function = click.option('--foo', is_flag=True)(function)
    return function

@click.command()
@common_options
def command():
    pass